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A kind of consolidated sand system and its preparation method and use method

A system and conjunctival technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of poor strength, poor alkali resistance, insufficient strength, etc., and achieve simple curing conditions, good adhesion performance, high The effect of compressive strength

Active Publication Date: 2019-06-28
北京昆仑隆源石油开采技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The resins mainly used in the prior art are: phenolic resin, furan resin, polyurethane resin and epoxy resin, but these resins still have disadvantages such as poor strength, need to be cured under specific conditions, and poor corrosion resistance. The sand agent and its use method can only be applied to one or a certain type of fluid ore, and its applicability is narrow
[0004] At present, most oilfields have entered the stage of tertiary recovery, and ternary polymer flooding is required to increase the recovery rate. The ternary polymer is an alkaline system, and the general consolidated sand system cannot be consolidated or cannot reach the level under alkaline conditions. The required strength, even if a part can be consolidated, the alkali resistance after consolidation is poor and cannot be used, so it is necessary to develop a new type of alkali-resistant consolidated sand

Method used

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  • A kind of consolidated sand system and its preparation method and use method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Select quartz sand with a particle size of 850-425μm as the aggregate, heat 2kg of quartz sand to 350°C, put the quartz sand in a mixer and stir to cool it, and add epoxy modification when the temperature of the quartz sand drops to 230°C 10g of phenolic resin was stirred for 30s, and at this time, the epoxy modified phenolic resin would form a reinforced layer on the outer surface of the aggregate; then add 10g of urotropine aqueous solution with a mass concentration of 10%, and continue to stir for 120 seconds, so that there is a reinforced layer re-disperse the aggregate evenly; add 30g bisphenol A epoxy resin, 30g epoxy modified phenolic resin and 6g diaminodiphenylmethane mixture and stir for 10 seconds, so that the outer surface of the reinforcement layer can form a functional layer, add 6g The mass concentration is 16% urotropine aqueous solution and stirred for 30 seconds to disperse the aggregate again, then add 5ml mass concentration of 0.5% sodium dodecylbenze...

Embodiment 2

[0031] Select quartz sand with a particle size of 850-425μm as the aggregate, heat 2kg of quartz sand to 250°C, put the quartz sand in a mixer and stir to cool it, and add epoxy modification when the temperature of the quartz sand drops to 180°C 45g of phenolic resin was stirred for 10s, and now the epoxy-modified phenolic resin would form a reinforcement layer on the outer surface of the aggregate; then add 30g of urotropine aqueous solution with a mass concentration of 15%, and continue to stir for 15 seconds to make a reinforcement layer The aggregate re-dispersed evenly; then add the mixture of 12.5g bisphenol A epoxy resin, 12.5g epoxy modified phenolic resin and 10g diaminodiphenylmethane and stir for 60 seconds, so that the outer surface of the reinforcement layer can form a functional layer, Adding 30g mass concentration is 20% urotropine aqueous solution and stirring for 15 seconds to disperse the aggregate again, then adding 4ml mass concentration is 1% sodium dodecyl...

Embodiment 3

[0033] Select quartz sand with a particle size of 850-425 μm as the aggregate, heat 2kg of quartz sand to 300°C, put the quartz sand in a mixer to stir and cool it, and add epoxy modification when the temperature of the quartz sand drops to 205°C 100g of phenolic resin was stirred for 60s, at this time, the epoxy modified phenolic resin would form a reinforced layer on the outer surface of the aggregate; then add 50g of urotropine aqueous solution with a mass concentration of 20%, and continue to stir for 30 seconds, so that there is a reinforced layer redisperse the aggregate evenly; add 36g of bisphenol A epoxy resin, 36g of epoxy modified phenolic resin and 1.8g of diaminodiphenylmethane mixture and stir for 30 seconds, so that the outer surface of the reinforcement layer can form a functional layer, adding 3.6g mass concentration is 10% urotropine aqueous solution and stirs for 120 seconds to disperse the aggregate again, then add 3ml mass concentration and then add 5% sodi...

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Abstract

The invention belongs to the field of oil-gas fields, and particularly relates to a consolidated sand system, and a preparation method and application method thereof. The consolidated sand system comprises proppant particles, wherein the proppant particles comprise aggregate and a consolidating film attached to the outer surface of the aggregate; and the consolidating film comprises a reinforcement layer, a functional layer and a dispersion layer which are sequentially coated on the outer surface of the aggregate. The reinforcement layer comprises a modified phenolic resin and a urotropine water solution; the functional layer comprises an epoxy resin, a modified phenolic resin, an aromatic amine curing agent and a urotropine water solution; and the dispersion base layer comprises a water-soluble anionic surfactant solution. The consolidated sand system has favorable acid / alkali resistance, can solidify in various environments, has high strength, and is convenient for construction.

Description

technical field [0001] The invention belongs to the field of sand consolidation and sand control, and specifically relates to a consolidation sand system, a preparation method and a use method thereof. Background technique [0002] During the mining of fluid ore, due to the nature of the ore body itself, it is very easy to produce sand from the ore body. A slight sand production from the ore body will affect the structure and mechanical properties of the ore body, and a large amount of sand production from the ore body will cause subsidence. Therefore In order to avoid the impact of ore body sand production on body structure performance and the safety performance of mining personnel, chemical sand control and sand consolidation methods are usually used to strengthen the ore body. [0003] The usual chemical sand control and sand-fixing stone cements loose sandstone and sand grains to stabilize the underlying stratum structure. The operation method is: add resin, surfactant,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/565
CPCC09K8/5755
Inventor 王光杨尚达贾煜张鑫
Owner 北京昆仑隆源石油开采技术有限公司
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